I have done every mod that can realistically be done to the b. Torq loops, cobras, gulh ecu reflash, k&n filter along with many lets make it pretty and comfortable mods. I've got two friends with stock b's and they can't believe the difference the ecu reflash has made. Has to be experienced to see the difference. It added a grand to the rev limiter and before the reflash coming out of first the old girl wouldn't spin the tire without popping the clutch. Now you have to be careful. Don at gulh hasn't figured out how to fool the top end limiter but my Honda dealership has. I'll keep you posted on the real top end of these bikes. I've got another friend that figured out how to trick the top end limit and he swears it will top out at 145 but no concrete evidence yet.